CN108696155A - The fault detection method of converter apparatus and power component - Google Patents
The fault detection method of converter apparatus and power component Download PDFInfo
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- CN108696155A CN108696155A CN201810301211.7A CN201810301211A CN108696155A CN 108696155 A CN108696155 A CN 108696155A CN 201810301211 A CN201810301211 A CN 201810301211A CN 108696155 A CN108696155 A CN 108696155A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1203—Circuits independent of the type of conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
- H02H7/1225—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to internal faults, e.g. shoot-through
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/02—Providing protection against overload without automatic interruption of supply
- H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/001—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection limiting speed of change of electric quantities, e.g. soft switching on or off
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
Abstract
A kind of fault detection method of converter apparatus and power component is provided.Converter apparatus has:Exchange conversion is direct current by converter;Direct-current chain capacitor is connect with the outlet side of converter;Voltage detection department detects direct-current chain condenser voltage;Charging circuit charges to direct-current chain capacitor;Charging circuit control unit, pair controls with the switch that charging resistor is connected in parallel;The electric current of converter is flowed through in current detecting part, detection;Control unit is connected, the conducting of power component is controlled;Power supply is connected and is detached by opening/closing portion;Power monitoring portion monitors the connection status of power supply;Threshold value configuration part sets first threshold or second threshold;And failure detecting section, it will be compared with first threshold or second threshold come the electric current flowed through when power component being made to be connected using the charge of the direct-current chain capacitor after power supply separation, to judge the failure of power component.
Description
Technical field
The present invention relates to a kind of failures of the converter apparatus and power component of the fault detection capability having power component
Detection method.
Background technology
As the method driven to motor using motor drive, in general known following one kind
Method:The alternating voltage inputted from main power source is transformed to direct current using the converter for having power transistor (power component)
Voltage, using inverter by the DC voltage conversion be alternating voltage after motor is driven.Here, if
Power transistor has occurred and provides AC power from main power source in the state of exception, it is likely that is caused to motor drive
Damage.Therefore, before providing the AC power from main power source to converter, detection power transistor has fault-free very heavy
It wants.
So far, a kind of power transistor fault detection method of DC-to-AC converter is reported (for example, Japanese Unexamined Patent Publication
8-080056 bulletins).Previous power transistor fault detection method is following method:At least having than transistor pair
Few one of quantity quantity, detection flow through motor winding electric current size current detector DC-to-AC converter
In power transistor fault detection method, before operating, low-voltage is being applied to the inverter being made of power transistor
Under state, power transistor on and off is made with regulation sequence, combination, flowing through motor using current detector detection winds
Each phase electric current, size and turn-on sequence, combination based on the electric current come carry out power transistor fault detect and which
The detection of failure has occurred in power transistor.
Invention content
However, in the case of converter apparatus, if inputting conducting letter to power component with the state for being connected to power supply
Number, then according to circumstances difference is possible to cause power supply short circuit and make converter apparatus that breakage occur.
Converter apparatus involved by embodiment of the disclosure has:Converter has multiple power components, the conversion
Device exports after the alternating voltage supplied from power supply is transformed to DC voltage;Direct-current chain capacitor, the outlet side with converter
Connection;Voltage detection department detects the voltage of direct-current chain capacitor;Charging circuit is configured in converter and direct-current chain capacitance
Between device, charge to direct-current chain capacitor;Charging circuit control unit, to being connected in parallel with charging resistor in charging circuit
Switch controlled;The electric current between converter and direct-current chain capacitor is flowed through in current detecting part, detection;Conducting control
Portion controls the conducting of multiple power components of converter;Opening/closing portion connects or separates power supply and converter;
Power monitoring portion controls the opening and closing of opening/closing portion, and detects the voltage inputted to converter, to monitor power supply and turn
Connection status between parallel operation;Threshold value configuration part, setting for judge multiple power components have trouble-free first threshold or
Second threshold;And failure detecting section, it will utilize and be detached from converter by opening/closing portion immediately in power supply and switch disconnection
The charge of direct-current chain capacitor afterwards is come the electric current that flows through and first threshold or the second threshold when the power component of converter being made to be connected
Value is compared, to judge that power component has fault-free.
The fault detection method of power component involved by embodiment of the disclosure is the failure of following converter apparatus
Detection method:The converter apparatus has:Converter has multiple power components, the friendship which will supply from power supply
Galvanic electricity buckling exports after being changed to DC voltage;Direct-current chain capacitor is connect with the outlet side of converter;Current detecting part,
The electric current between converter and direct-current chain capacitor is flowed through in detection;And opening/closing portion, power supply is connected or separated with converter,
In the fault detection method of converter apparatus, power supply is connect by opening/closing portion closure with converter, to direct-current chain capacitor
It charges, later, opening/closing portion is controlled and detaches power supply from converter for off-state, divide from converter immediately in power supply
The electric current between converter and direct-current chain capacitor is flowed through from detection later, by the electric current detected and first threshold or the second threshold
Value, which is compared to judgement power component, fault-free.
Description of the drawings
By the explanation with the associated the following embodiments and the accompanying drawings of attached drawing, the purpose of the present invention, feature and advantage can be made more
Add clear.In the figure,
Fig. 1 is the structure chart of the converter apparatus involved by embodiment,
Fig. 2 is in the converter apparatus shown involved by embodiment in the path of the electric current flowed through when fault detect
Example figure,
Fig. 3 is the open fault detection process of the fault detection method for illustrating the converter apparatus involved by embodiment
Flow chart, and
Fig. 4 is the short trouble of the fault detection method for illustrating the converter apparatus involved by the variation of embodiment
The flow chart of detection process.
Specific implementation mode
In the following, with reference to attached drawing come the converter apparatus to the fault detection capability according to the present invention for having power component
It is illustrated with the fault detection method of power component.Wherein, protection scope of the present invention is not limited to these embodiments, wishes
Hope invention and its equivalent involved point noticed recorded in claims.
First, to the converter apparatus of the fault detection capability for having power component involved by embodiment of the disclosure into
Row explanation.The structure chart of the converter driving device involved by embodiment is shown in FIG. 1.Converter dress involved by embodiment
It sets 100 and has converter 1, direct-current chain capacitor 2, voltage detection department 3, charging circuit 4, charging circuit control unit 5, current detecting
Portion 6, conducting control unit 7, opening/closing portion 8, power monitoring portion 9, threshold value configuration part 10 and failure detecting section 11.
Converter 1 has multiple (for example, 6) power component (Tr1~Tr6).Converter 1 passes through to multiple power components
(Tr1~Tr6) switch motion (conducting) is selectively carried out, the alternating voltage supplied from power supply 20 is transformed to DC voltage
After export, or carry out power supply regenerative action.Moreover it is preferred that having as shown in Figure 1 and power component (Tr1~
Tr6) reverse parallel connection multiple (for example, 6) diode (D1~D6).In power component (Tr1~Tr6) in, crystal can be used
Pipe, FET (Field Effect Transistor:Field-effect transistor), IGBT (Insulated Gate Bipolar
Transistor:Insulated gate bipolar transistor) etc..
Direct-current chain capacitor 2 is connect with the outlet side of converter 1.Direct-current chain capacitor 2 is to the direct current that is exported from converter 1
Voltage is smoothed.DC voltage to after motor drive supply smoothing (not shown).
Voltage detection department 3 detects the voltage of direct-current chain capacitor 2.Specifically, by being arranged at the end of direct-current chain capacitor 2
Voltage sensor 31 between son detects the voltage between terminals of direct-current chain capacitor 2, and testing result is sent to voltage detection department 3.To
Failure detecting section 11 exports the voltage of the direct-current chain capacitor 2 got by voltage detection department 3.
Charging circuit 4 configures between converter 1 and direct-current chain capacitor 2, charges to direct-current chain capacitor 2.
The switch of charging circuit 42 is disconnected when charging to direct-current chain capacitor 2, is thus charged via charging resistor 41,
Therefore big surge current can be avoided to flow into direct-current chain capacitor 2.
Charging circuit control unit 5 controls the switch 42 being connected in parallel with charging resistor 41 in charging circuit 4.As above
Described, when charging to direct-current chain capacitor 2, charging circuit control unit 5 disconnects switch 42.In direct-current chain capacitor 2
Charging complete in the case of, by switch 42 connect.In addition, in the fault detect of aftermentioned power component, switch 42 is broken
It opens to avoid excessive current direction power component.
Current detecting part 6 detects the electric current flowed through between converter 1 and direct-current chain capacitor 2.Specifically, in converter
Current sensor 61 is set between 1 and direct-current chain capacitor 2, is detected to the transmission of current detecting part 6 by current sensor 61
The value of electric current.The value of the electric current got by current detecting part 6 is exported to failure detecting section 11.
Multiple power component (Trs of the control unit 7 to converter 1 are connected1~Tr6) conducting controlled.Converter 1 according to
Make multiple power component (Tr from the signal that control unit 7 is connected1~Tr6) selectively turn on, thus it will be supplied from power supply 20
Alternating voltage be transformed to DC voltage after export, or carry out power supply regenerative action.
Opening/closing portion 8 connects or separates power supply 20 and converter 1.Here, opening/closing portion 8 has and is three-phase alternating-current supply
Each corresponding three switches of power supply 20.In addition, in fig. 1 it is illustrated that being used as the example of power supply 20 using three-phase alternating-current supply
Son, but power supply is not limited to three-phase alternating-current supply, or single phase alternating current power supply.
Power monitoring portion 9 controls the opening and closing of opening/closing portion 8, and detects the voltage inputted to converter 1, to monitor
The state being connect between power supply 20 and converter 1.It is notified to failure detecting section 11 based on power monitoring portion 9 to opening/closing portion 8
The content of open and close control.In opening/closing portion 8, electromagnetic contactor etc. can be used.
By being set as the state (closed state) of the closure of opening/closing portion 8, power supply 20 connect to converter 1 with converter 1 and supplies
To alternating voltage.At this point, alternating voltage is transformed to DC voltage by converter 1, DC voltage is applied to direct-current chain capacitor 2
It charges.
On the other hand, it is the state (off-state) disconnected by being set as opening/closing portion 8, converter 1 is detached from power supply 20, is stored
Product is discharged in the charge of direct-current chain capacitor 2.
Threshold value configuration part 10 is set for judging power component (Tr1~Tr6) there is trouble-free first threshold ITH1With second
Threshold value ITH2.If first threshold ITH1To be used to detect power component (Tr1~Tr6) open fault threshold value, if second threshold
ITH2To be used to detect power component (Tr1~Tr6) short trouble threshold value.Can be set as threshold value configuration part 10 can be based on from
Externally input signal is to first threshold ITH1With second threshold ITH2It is written over.By the rewriting of threshold value, generation can carry out
According to the advantage that the fault detect of use condition is such.
Failure detecting section 11 will be utilized immediately in power supply 20 through opening/closing portion 8 from the separation of converter 1 and switch 42 disconnection
The charge of direct-current chain capacitor 2 afterwards is come the electric current that flows through and first threshold I when the power component of converter 1 being made to be connectedTH1With
Two threshold value ITH2It is compared, to judge that power component has fault-free.
In fig. 2 it is shown that in the electric current flowed through when fault detect in converter apparatus involved by embodiment
Example.As shown in Fig. 2, using immediately in power supply 20 from converter 1 separation after accumulation in direct-current chain capacitor 2 charge come
The conducting for carrying out power component, the failure of power component is detected by the electric current flowed through.Six power components of converter 1
(Tr1~Tr6) in Tr1,Tr3,Tr5For the power component of upper arm 101, six power component (Tr of converter 11~Tr6) in
Tr2,Tr4,Tr6For the power component of underarm 102.It, can also be by Tr also, in the case of three-phase alternating current1And Tr2It is set as U
Phase power component, by Tr3And Tr4V phase power components are set as, by Tr5And Tr6It is set as W phase power components.Such as Fig. 2 institutes
Show, for example, will be for the power component Tr of the upper arm of the U phases of identical phase1With the power component Tr of underarm2It is also turned on, passes through stream
Whether there is or not open faults to judge power component for the electric current crossed.For example, the case where electric current arrow A as shown in Figure 2 flows through like that
Under, it can be determined that converter apparatus 100 is normal.On the other hand, it is the first threshold in the electric current detected by current sensor 61
Value ITH1In the case of below, it can be determined that open fault has occurred.
Here, it is preferable that when conducting control unit 7 makes power component be connected, filled using the control of charging circuit control unit 5
Circuit 4 is to avoid excessive current direction power component.That is, by immediately in power supply 20 from converter 1 separation after direct current
Power component (the Tr of chain capacitor 2 and upper underarm (101,102)1~Tr6) be connected to carry out the fault detect of power component, but
Preferably the switch 42 of charging circuit 4 is disconnected to limit the electric current for flowing to power component at this time.The reason is that not having
In the case of the element for limiting electric current, simply makes two terminal shortcircuits of direct-current chain capacitor 2, power component (Tr can be caused1~
Tr6) damaged.
Also, failure detecting section 11 can be according to the power of either one in the upper arm 101 and underarm 102 by converter 1
Element is (for example, Tr1) electric current that flows through detects the power component of another party in upper and lower arms (for example, Tr when connecting2) have
Without short trouble.In the example shown in Fig. 2, by Tr1It connects and by Tr2In the case of disconnection, if Tr2Normally, then electric current
Tr is not flowed through2, therefore can't detect electric current using current sensor 61.On the other hand, no matter Tr2Whether disconnects and utilize
Current sensor 61 can detect the electric current I (s > of regulation or more;ITH2) in the case of, it can be determined that Tr2Short-circuit event has occurred
Barrier.
As described above, the converter apparatus involved by the present embodiment, by with immediately in by power supply from conversion
The electric current for making power component connect in the charge of direct-current chain capacitor using accumulation after device separation and flowing through, to judge power member
Whether there is or not open faults and short trouble for part.
Failure detecting section 11 can also pass through in the case where detecting the open fault or short trouble of power component
Lamp, alarm signal etc. notify exception has occurred.Exception can has occurred by identification power component to prevent power supply in operator
To connecting again for converter apparatus.
Then, to the detection method of the open fault for the power component for having used the converter apparatus involved by embodiment into
Row explanation.Fig. 3 is the detection method for the open fault to the power component based on the converter apparatus involved by embodiment
The flow chart that illustrates of process fault detection.First, in step S101, opening/closing portion 8 is closed by power monitoring portion 9 will
Power supply 20 is connect with converter 1.As a result, after the alternating voltage supplied from power supply 20 to converter 1 is transformed to DC voltage
It is exported to direct-current chain capacitor 2.
Then, in step s 102, charge to direct-current chain capacitor 2.Direct-current chain capacitor 2 is charged between terminal
Voltage with from until the DC voltage that converter 1 exports is equal.Later, motor drive becomes enabled state.
Then, in step s 103, power monitoring portion 9 by opening/closing portion 8 control be off-state, by switch 42 disconnection come to
Power component exports Continuity signal.Specifically, output Continuity signal make only by with the identical upper and lower arms being connected
Power component connect.The timing of step S103 is executed preferably from opening/closing portion 8 is set as closed state in step S101
It is carried out after have passed through the time for the charging for being assumed to fully to carry out direct-current chain capacitor 2.Specifically, it is assumed that electronic
Machine actuating device etc. is entered the case where instructions such as emergent stopping etc. after being acted.
Then, in step S104, the electric current I between converter 1 and direct-current chain capacitor 2 is flowed through in detectionDC.Power monitoring
The control of opening/closing portion 8 is off-state to the notice of failure detecting section 11 while opening/closing portion 8 is set as off-state by portion 9.
Failure detecting section 11 immediately flows through converter and direct-current chain capacitor 2 from the reception of current detecting part 6 upon receipt of the notification
Between electric current IDCTesting result.
Then, in step S105, failure detecting section 11 judges to flow through the electricity between converter 1 and direct-current chain capacitor 2
Flow IDCWhether first threshold I is more thanTH1.In IDCMore than first threshold ITH1In the case of, it is determined as that power component is not opened
Road failure.Thus, in this case, in step s 106, failure detecting section 11 is determined as the power component of converter apparatus 100
Normally.
On the other hand, in IDCFor first threshold ITH1In the case of below, it is determined as that open fault has occurred in power component.
Thus, in this case, in step s 107, failure detecting section 11 is determined as that the power component of converter apparatus 100 has occurred
Open fault.
Then, it is carried out come the method for the short trouble to detecting power component using the converter apparatus involved by embodiment
Explanation.In fig. 4 it is shown that be used to illustrate the fault detection method of the converter apparatus involved by the variation based on embodiment
The flow chart of short trouble detection process.Step S201~S202 and step the S101 in the detection process of above-mentioned open fault
~S102 is identical.In step S203, detached from converter 1 immediately in power supply 20 and after the disconnection of switch 42 by converter 1
The power component of either one in upper underarm is connected.For example, in fig. 2, being set as the power component Tr of the upper arm of U phases1It connects
And by other power component Tr2~Tr6The state remained open.
In step S204, the I between converter 1 and direct-current chain capacitor 2 is flowed through in detectionDC.It is sent out to failure detecting section 11
Send detected current value IDC。
Then, in step S205, Cutoff current IDCWhether second threshold I is less thanTH2.In electric current IDCFor second threshold
ITH2In the case of above, in step S206, it is determined as that short trouble has occurred in the power component of converter apparatus 100.
On the other hand, in electric current IDCLess than second threshold ITH2In the case of, in step S207, it is determined as that converter fills
Set 100 power component it is normal.
As described above, the fault detection method involved by the variation according to the present embodiment, failure detecting section
11 electric currents flowed through when can be connected according to the power component of either one in the upper and lower arms by converter detect upper arm
With the power component of another party in underarm whether there is short circuit failure.
The converter apparatus and work(of the involved fault detection capability for having power component in accordance with an embodiment of the present disclosure
The fault detection method of rate element, can detect converter apparatus power component have it is without exception.
Claims (10)
1. a kind of converter apparatus, has:
Converter has multiple power components, after which is transformed to DC voltage by the alternating voltage supplied from power supply
Output;
Direct-current chain capacitor is connect with the outlet side of the converter;
Voltage detection department detects the voltage of the direct-current chain capacitor;
Charging circuit configures between the converter and the direct-current chain capacitor, is carried out to the direct-current chain capacitor
Charging;
Charging circuit control unit, to being controlled with the switch that charging resistor is connected in parallel in the charging circuit;
The electric current between the converter and the direct-current chain capacitor is flowed through in current detecting part, detection;
Control unit is connected, the conducting of the multiple power component of the converter is controlled;
Opening/closing portion connects or separates power supply and the converter;
Power monitoring portion controls the opening and closing of the opening/closing portion, and detects the voltage inputted to the converter, comes
Monitor the connection status between power supply and the converter;
Threshold value configuration part is set for judging that the multiple power component has trouble-free first threshold or second threshold;With
And
Failure detecting section, will utilize detached from the converter by the opening/closing portion immediately in power supply and it is described switch broken
The charge of the direct-current chain capacitor after opening the electric current that the flows through when power component of the converter being made to be connected with it is described
First threshold or the second threshold are compared, to judge that the power component has fault-free.
2. converter apparatus according to claim 1, which is characterized in that
When the conducting control unit makes power component be connected, the charging circuit is controlled using the charging circuit control unit
The power component is flowed through to avoid excessive electric current.
3. converter apparatus according to claim 1 or 2, which is characterized in that
The failure detecting section is also turned on the converter with the power component of the identical upper and lower arms being connected
When the electric current that flows through be compared with the first threshold, come the power component that detects upper and lower arms, whether there is or not open faults.
4. converter apparatus according to claim 1 or 2, which is characterized in that
The electricity that the failure detecting section flows through when connecting the power component of either one in the upper and lower arms of the converter
Stream is compared with the second threshold, come the power component that detects another party in upper and lower arms whether there is short circuit failure.
5. converter apparatus according to any one of claims 1 to 4, which is characterized in that
The threshold value configuration part can based on from externally input signal come to the first threshold or the second threshold progress
It rewrites.
6. a kind of fault detection method of the power component of converter apparatus, the converter apparatus have:
Converter has multiple power components, after which is transformed to DC voltage by the alternating voltage supplied from power supply
Output;
Direct-current chain capacitor is connect with the outlet side of the converter;
The electric current between the converter and the direct-current chain capacitor is flowed through in current detecting part, detection;And
Opening/closing portion connects or separates power supply and the converter,
In the fault detection method of the power component of the converter apparatus,
The opening/closing portion is closed and connect power supply with the converter,
It charges to the direct-current chain capacitor,
Later, the opening/closing portion is controlled and detaches power supply from the converter for off-state,
It is flowed through between the converter and the direct-current chain capacitor from detection after converter separation immediately in power supply
Electric current,
It is compared to the electric current detected and first threshold or second threshold to judge that the power component has fault-free.
7. the fault detection method of power component according to claim 6, which is characterized in that
When making the power component be connected, control charging circuit flows through the power component to avoid excessive electric current, this is filled
Electric circuit configuration charges to the direct-current chain capacitor between the converter and the direct-current chain capacitor.
8. the fault detection method of the power component described according to claim 6 or 7, which is characterized in that
The electric current of the converter flowed through when being also turned on the power component of the identical upper and lower arms being connected is same
The first threshold is compared, and come the power component that detects upper and lower arms, whether there is or not open faults.
9. the fault detection method of the power component described according to claim 6 or 7, which is characterized in that
The electric current flowed through when the power component of either one in the upper and lower arms of the converter is connected and second threshold
Value is compared, come the power component that detects another party in upper and lower arms whether there is short circuit failure.
10. the fault detection method of the power component according to any one of claim 6 to 9, which is characterized in that
Threshold value configuration part can also be based on being written over the first threshold or the second threshold from externally input signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-076983 | 2017-04-07 | ||
| JP2017076983A JP6420399B1 (en) | 2017-04-07 | 2017-04-07 | Converter device having power element failure detection function and power element failure detection method |
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| Publication Number | Publication Date |
|---|---|
| CN108696155A true CN108696155A (en) | 2018-10-23 |
| CN108696155B CN108696155B (en) | 2019-10-25 |
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| CN201810301211.7A Active CN108696155B (en) | 2017-04-07 | 2018-04-04 | The fault detection method of converter apparatus and power component |
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|---|---|
| US (1) | US10320281B2 (en) |
| JP (1) | JP6420399B1 (en) |
| CN (1) | CN108696155B (en) |
| DE (1) | DE102018107771A1 (en) |
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| CN111487528A (en) * | 2020-04-08 | 2020-08-04 | 纳恩博（北京）科技有限公司 | Fault detection method and circuit of power element |
| CN111688492A (en) * | 2019-03-14 | 2020-09-22 | 本田技研工业株式会社 | Power supply system |
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| US11804787B2 (en) * | 2018-09-28 | 2023-10-31 | Mitsubishi Electric Corporation | Power converting apparatus, motor driving apparatus, and air conditioner |
| DE102018128121A1 (en) * | 2018-11-09 | 2020-05-14 | Eaton Intelligent Power Limited | AC / DC conversion arrangement |
| US10886858B1 (en) * | 2019-10-15 | 2021-01-05 | University Of Tennessee Research Foundation | Modular multi-level converter pre-chargers |
| EP4152542A1 (en) * | 2021-09-17 | 2023-03-22 | Mitsubishi Electric R&D Centre Europe B.V. | Overvoltage protection for high power current fed converters using di(t)/dt sensors |
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| DE102018107771A1 (en) | 2018-10-18 |
| US10320281B2 (en) | 2019-06-11 |
| US20180294711A1 (en) | 2018-10-11 |
| CN108696155B (en) | 2019-10-25 |
| JP6420399B1 (en) | 2018-11-07 |
| JP2018182852A (en) | 2018-11-15 |
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